Continuous Steam Sterilization Production Line for Spices 

Solutions for Industry Pain Points

Spices such as Chinese prickly ash, star anise, chili, black pepper and cinnamon naturally carry salmonella, Escherichia coli, mold and insect eggs. Traditional intermittent sterilization, irradiation and ethylene oxide fumigation have prominent drawbacks. Long-time high-temperature treatment will cause the volatilization of essential oil, loss of aroma and darkening of color and luster. Irradiation is subject to market access restrictions and consumer resistance, while chemical fumigation may lead to excessive residues, failing to meet the standards of organic food and European & American supermarket exports.

Adopting HTST (High Temperature Short Time) saturated steam sterilization technology, the continuous steam sterilization line for spices perfectly balances thorough sterilization and natural flavor retention. It serves as the core standardized mass production equipment for condiment factories and spice export enterprises.

Core Working Principle

The whole machine adopts a fully enclosed assembly line structure, consisting of a feeding air-lock bin, multi-stage constant-temperature sterilization chamber, thin-layer vibration conveying system, steam circulation system, rapid drying and cooling unit, and sealed discharging unit.

Materials are evenly spread and conveyed in a thin layer at a constant speed. The 102–122℃ precisely controlled saturated steam penetrates into the interior of materials in all directions, inactivating microbial proteins instantly within 20–40 seconds. After sterilization, gradient cooling is implemented immediately to lock the spice aroma. The whole enclosed operation isolates external pollution and eliminates secondary bacterial contamination, realizing fully automatic continuous operations of feeding – sterilization – drying – cooling.

Core Advantages

1. Original Flavor & Color Retention
The high-temperature short-time sterilization mode effectively avoids the loss of spice essential oil and effective ingredients caused by long-term high-temperature heating. It perfectly retains the original strong aroma, natural color and nutritional properties of raw spices, with no peculiar smell generated during processing.

2. Thorough & Safe Sterilization
Pure physical saturated steam sterilization with no chemical residues. It thoroughly kills harmful microorganisms including mold, Escherichia coli, salmonella and insect eggs in spices, fully compliant with FDA, EU food safety and export food hygiene standards.

3. Continuous & Efficient Production
Automatic assembly line continuous operation replaces traditional intermittent batch processing. It features stable feeding, uniform sterilization effect and high production capacity, effectively improving enterprise production efficiency and suitable for large-scale industrial mass production.

4. Closed Pollution-free Operation
The fully sealed production structure isolates dust and bacteria in the air to prevent secondary pollution of materials. The whole process is clean, hygienic and environmentally friendly, meeting the high-standard production requirements of organic spices and high-end condiments.

5. Wide Application Range

Applicable for sterilization and fresh-keeping processing of various granular, flaky and powdery spices, including chili, prickly ash, star anise, cinnamon, cumin, black pepper, white pepper, coriander and various compound seasonings.